Search a number
-
+
12202212221 = 25943470347
BaseRepresentation
bin10110101110100111…
…01111101101111101
31011111101121121100222
423113103233231331
5144442231242341
65334451431125
7611245043513
oct132723575575
934441547328
1012202212221
1151a1915711
1224465b54a5
1311c6014a24
1483a8184b3
154b63b544b
hex2d74efb7d

12202212221 has 4 divisors (see below), whose sum is σ = 12202708512. Its totient is φ = 12201715932.

The previous prime is 12202212163. The next prime is 12202212223. The reversal of 12202212221 is 12221220221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12202212221 - 218 = 12201950077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12202212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12202212223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209231 + ... + 261116.

It is an arithmetic number, because the mean of its divisors is an integer number (3050677128).

Almost surely, 212202212221 is an apocalyptic number.

It is an amenable number.

12202212221 is a deficient number, since it is larger than the sum of its proper divisors (496291).

12202212221 is an equidigital number, since it uses as much as digits as its factorization.

12202212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496290.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12202212221 its reverse (12221220221), we get a palindrome (24423432442).

The spelling of 12202212221 in words is "twelve billion, two hundred two million, two hundred twelve thousand, two hundred twenty-one".

Divisors: 1 25943 470347 12202212221